(A, B) +dP/dt and −dP/dt recovery from I/R injury is restored in GCN5L1 cKO mice in the presence of ROS-scavenger N-acetyl cysteine (NAC). (C-E) Recovery after reperfusion in the presence of NACasa percentage of +dP/dt, −dP/dt, and workload. (F) Infarct volume is reduced three-fold in cKO mice in the presence of NAC following I/R injury, and is no longer significantly different from wildtype mice. (G-I) Changes in post-ischemic function relative to untreated hearts from Figure 3. N = 5 mice per group. ** = P < 0.01, *** = P < 0.001, **** = P <0.0001 vs. WT.